How Obama’s approval ratings stack up with history

President Barack Obama’s once sky-high approval ratings have been on a steady slide, but how do they stack up to say, Nixon, or Carter?

TalkingPointsMemo.com has compiled an interactive graphic from Gallup Poll data that shows you — month by month — just how the current president’s ratings compare to past chief executives. The graph, which initially looks little like a Jackson Pollock painting, can be broken out by president.